MAF and O2 sensor do not operate for the first ten seconds or so, so we can rule those out.
Moderate fuel enrichment is normal when starting up, the wetter the worse it can be. Sounds to me like the enrichment is too rich, so here is what you should do to cut the places to check in half.
Try and start it for ten seconds or so, then stop and pull a spark plug. Is it wet, dry? Wet, too much fuel, possible ECT failure or beginning to fail. Dry, lack of fuel, possible fuel pump relay going bad, or the fuel lines are purging when you are trying to start it, bad check valves...
You yourself can check the codes with the OBD, do that and it could take you to your source right away.